This edition, chronologically the fourth printed, of Albertus's commentaries on various works of Aristotle, contains the first printed illustration of the brain, showing in profile the three-cell theory of brain function in a schematic way that was based very loosely on Galen, but initially formalized in the late 4^th century by the Christian theologian, Nemesius, Bishop of Emesa. "In his book, De Natura Hominis (On the Nature of Man), Nemesius postulated that all faculties of the immaterial soul are located entirely in the ventricles, with each of them being responsible for a specific quality based on Aristotle’s classification of these functions. Essentially Nemesius attributed sensation and the unification of images (common sense) to the refinement of psychic pneuma (animal spirits) in our lateral ventricles (together the first ventricle), cognition to our third ventricle (the second ventricle), and memory to our fourth ventricle (the third ventricle). This exceptionally complex topic was greatly elaborated over the centuries, and crudely illustrated in certain manuscripts before the version printed in 1490. The relevant manuscript and early printed versions are thoroughly illustrated by Clarke & Dewhurst (1996)" (communication from Larry W. Swanson). ISTC no. ia00296000.